Microsoft has disclosed the first details of Windows 10 - its next operating system (OS).
The name is a surprise, bearing in mind it represents a jump from the last version - Windows 8.
The software will run on a wide range of devices, from phones and tablets to PCs and Xbox games consoles, with applications sold from a single store.
It also marks the return of the Start Menu, which had been removed from Windows 8.
In addition to offering a list of the user's favourite applications, the menu also brings up resizable tiles - similar to those featured in Windows 8's touch-centric interface on PCs and tablets.
These provide a quick view of notifications from relevant applications, such as details of new emails, Facebook messages and weather forecast updates.